<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="黑马头条">
      <van-icon slot="left" name="arrow-left" @click="$router.back()" />
    </van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div v-if="status == 0" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="status === 200" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{ article.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="article.aut_photo"
          />
          <div slot="title" class="user-name">{{ article.aut_name }}</div>
          <div slot="label" class="publish-date">
            {{ article.pubdate | dateFormat }}
          </div>
          <!-- 关注 按钮 -->
          <followbtn
            class="follow-btn"
            v-model="article.is_followed"
            :aut_id="article.aut_id"
          ></followbtn>
          <!-- 关注 按钮 -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div
          class="article-content markdown-body"
          v-html="article.content"
          ref="articleCotent"
        ></div>
        <van-divider>正文结束</van-divider>

        <!-- 评论列表数据 -->
        <commentList
          :art_id="article.art_id"
          ref="commentObj"
          @total_commen="total = $event"
          @curruntcommentData="curruntCommen"
        ></commentList>
        <!-- 评论列表数据 -->

        <!-- 底部区域 -->
        <div class="article-bottom">
          <van-button
            class="comment-btn"
            @click="openComment"
            type="default"
            round
            size="small"
          >
            写评论
          </van-button>
          <van-icon name="comment-o" :badge="total" color="#777" />
          <!-- 我是 收藏 组件 -->
          <collectIcon
            color="#777"
            v-model="article.is_collected"
            :art_id="article.art_id"
          ></collectIcon>
          <!-- 我是 收藏 组件 -->
          <!-- <van-icon color="#777" name="star-o" /> -->
          <!-- 我是 点赞 组件 -->
          <clickLike
            color="#777"
            v-model="article.attitude"
            :art_id="article.art_id"
          ></clickLike>
          <!-- 我是 点赞 组件 -->
          <!-- <van-icon color="#777" name="good-job-o" /> -->
          <van-icon name="share" color="#777777"></van-icon>
        </div>
        <!-- /底部区域 -->
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="status == 404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <!-- 发表 评论 的弹出层 -->
    <van-popup
      v-model="isPostShow"
      position="bottom"
      :style="{ height: '17%' }"
    >
      <cmtAdd :target="article.art_id" :commentData="commentData"></cmtAdd>
    </van-popup>
    <!-- 发表 评论 的弹出层 -->
    <!-- 评论回复 -->
    <van-popup v-model="isReplyShow" position="bottom" style="height: 95%">
      <commentReply :comment="curruntCommen"></commentReply>
    </van-popup>
    <!-- /评论回复 -->
  </div>
</template>
<script>
// 导入 关注 按钮
import followbtn from '@/components/followMe/index.vue'
// 导入 收藏 按钮
import collectIcon from '@/components/collect-btn/index.vue'
// 导入 点赞 按钮
import clickLike from '@/components/clickLike/index.vue'
// 导入 评论列表
import commentList from './components/CommentList.vue'
// 导入 评论列表
import cmtAdd from './components/cmtAdd.vue'
// 导入 回复评论 组件
import commentReply from './components/cmtReply.vue'
// 获取文章 数据
import { getArticleById } from '@/api/article.js'
// 引入 图片 预览 插件
import { ImagePreview } from 'vant'
export default {
  name: 'Article',
  props: {
    articleId: {
      type: [Number, String],
      required: true
    }
  },
  data() {
    return {
      article: {},
      status: 0,
      total: 0,
      isPostShow: false,
      isReplyShow: false,
      curruntCommen: {},
      commentData: []
    }
  },
  created() {
    this.onLoad()
  },
  // 利用 provide
  provide() {
    return {
      // 关闭弹出层组件
      isReplyShow: this.isReplyShow,
      closeReplyShow: this.closeReplyShow
    }
  },
  methods: {
    async onLoad() {
      try {
        const res = await getArticleById(this.articleId)
        // 修改文章内容 显示
        this.status = res.status
        // 获取文章数据
        this.article = res.data.data
        // 获取 到 文章 数据 之后的 状态码后 才显示 文章详情
        // this.$refs.commentObj.onLoad()
        // 补充
        // this
        this.$nextTick(() => {
          const imgLIst = this.$refs.articleCotent.querySelectorAll('img')
          console.log(imgLIst)
          const srcArr = []
          imgLIst.forEach((e) => {
            //  导入 图片地址
            srcArr.push(e.src)
            // 为每一张图片 注册 点击事件
            e.onclick = () => {
              ImagePreview({
                images: srcArr,
                startPosition: 0
              })
            }
          })
        })
      } catch (error) {
        this.status = error.response.status
      }
    },
    openComment() {
      this.isPostShow = true
    },
    curruntcommentData(comment) {
      this.curruntCommen = comment
      console.log(this.curruntCommen)
    },
    closeReplyShow() {
      this.isReplyShow = false
    },
    total_commen(totalCommen) {
      this.commentData = totalCommen
      console.log(totalCommen)
    }
  },
  computed: {},
  watch: {},
  components: {
    followbtn,
    collectIcon,
    clickLike,
    commentList,
    cmtAdd,
    commentReply
  }
}
</script>

<style lang="less" scoped>
@import url(./github-markdown.css);
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
